@Override public View getGroupView( int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { if (convertView == null) { convertView = layoutInflater.inflate(R.layout.category_expandble_list, parent, false); } TagsCategory category = (TagsCategory) getGroup(groupPosition); TextView tagsCategoryName = (TextView) convertView.findViewById(R.id.elementsCategoryName); tagsCategoryName.setText(category.getName()); return convertView; }